@article{oai:ir.kagoshima-u.ac.jp:00000676,
 author = {田中, 為夫 and TANAKA, Tameo and 実成, 義孝 and MINARI, Yoshitaka},
 journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University},
 month = {Sep},
 note = {Various kinds of DC tacho-generator are in use for automatic control systems. These tacho-generators, generally have ripple in voltage due to the commutation or nonuniform flux distribution. To obtain a uniform DC signal, it is necessary to add a filter circuit having a certain time constant. This finite time constant injures the performance of automatic control system. This paper is concerned with the DC tacho-generator based on new principle. Eddy current circulates in a metal disk when it rotates in magnetic field. This current induces another magnetic field, which is measured by means of Hall generator. The Hall voltage depends, in a near linear way, on rotating speed of the disk. Preliminary experiment is carried out with a model machine. The linearlity of speedoutput voltage character is observed, 
and the ripple remains not reduced yet. This DC tacho-generator has the possibility of practical use.},
 pages = {67--73},
 title = {制御用直流速度発電機に関する研究},
 volume = {8},
 year = {1967}
}